Sensitivity and frequency: turn the left rotary knob to adjust the sensitivity. and the range of the PIR sensor (5-8 m). Turn the right knob to adjust the ultrasound frequency (16khz-60khz). It can be adjusted according to needs and the animal species. Range: within a radius of 5 to 100 meters. 8 m, the cat repellent works. PIR detects at an angle of 110° (horizontal) and 60° (vertical). Practical: the level of sealing is is IPX4, which can be used outdoors. on rainy days to provide a better product experience. The integrated bars have three height-adjustable sections. The rods are made of aluminum alloy and plastic and are of good quality. Can also be hung at height. Power supply: and charging via USB is a backup charging method. When the cat repellent is on, the LED lamp mode is activated. Flame lights automatically at night and turns off automatically during the day, helping to drive away deer and other wild animals. Suitable for garage, garden, roof, utility box. sand and patio. Also suitable for wild camping. Can hunt cats, dogs, rats, mink, wild boars, etc. and keep martens away Function: Equipped with With a red LED trigger indicator, this sonic repellent generates ultrasonic waves at high speeds. a changing frequency to scare animals. When an animal enters the range of the PIR sensor, sound waves and a bright red light are activated. Ultrasonic waves behave the same as light waves : they do not pass through solid doors, walls and furniture, nor do they enter nests located under floors, nor in ceilings and wall cavities.